/*
 * Copyright &copy; 2010-2011 Rebecca G. Bettencourt / Kreative Software
 * <p>
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * <a href="http://www.mozilla.org/MPL/">http://www.mozilla.org/MPL/</a>
 * <p>
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 * <p>
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU Lesser General Public License (the "LGPL License"), in which
 * case the provisions of LGPL License are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL License and not to allow others to use
 * your version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the LGPL License. If you do not delete
 * the provisions above, a recipient may use your version of this file
 * under either the MPL or the LGPL License.
 * @since PowerPaint 1.0
 * @author Rebecca G. Bettencourt, Kreative Software
 */

package com.kreative.paint.filter;

public class HighLifeFilter extends CellularAutomatonFilter {
	public int[] getStateColors() {
		return new int[]{
				0xFFFFFFFF, // dead cell
				0xFF000000  // live cell
		};
	}
	public int getNeighborhoodXStart() { return -1; }
	public int getNeighborhoodXEnd() { return 1; }
	public int getNeighborhoodYStart() { return -1; }
	public int getNeighborhoodYEnd() { return 1; }
	public int getNextState(int[][] prevState) {
		int cell = prevState[1][1];
		int cnt = (cell > 0) ? -1 : 0;
		for (int[] r : prevState) {
			for (int i : r) {
				if (i > 0) cnt++;
			}
		}
		if (cell > 0) {
			// live cell
			return (cnt == 2 || cnt == 3) ? 1 : 0;
		} else {
			// dead cell
			return (cnt == 3 || cnt == 6) ? 1 : 0;
		}
	}
}
